I want to view my notifications older than 2 days ago but it doesn't go further. is there any way?

There's not really anything you can do. Mine go back just 1 hour. You may find in a day or few if you check your notifications, they go back farther. As mentioned, if you're using a mobile device make sure it's in desktop mode (or some functions on the site won't work for you).

If its not letting you go Further then that's the Closest your gonna be able to get Unfortunately

My notifications go back to 2 WEEKS ago when they stopped loading. 

Yes, you probably can change This. Here is how:

1) Tap "View activity profile" in the left column.

2) Tap "Edit preferences" in the header

3) Put a check mark in the box to the left of where it says Email me when someone answers all questions I have answered

4) Make sure you tap the "Save"  button at the bottom. 

It is NOT a glitch. 

I just checked mine and I could go out past a week with your problem.  If you are using a smartphone are you on desktop mode?  If not you should be because that my help.  If you still have problems then it must be a glitch and you just have to wait it out.